AU2015100320A4

AU2015100320A4 - Design method for magnetic turntable

Info

Publication number: AU2015100320A4
Application number: AU2015100320A
Authority: AU
Inventors: Zhu GONG
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-07-10
Filing date: 2015-03-15
Publication date: 2015-04-30
Anticipated expiration: 2023-03-15
Also published as: GB2533014B; GB201512052D0; CN104053258A; GB201512053D0; GB2533014A; CN104053258B

Abstract

Design method for magnetic turntable Abstract The invention relates to a design method for a magnetic turntable. The method includes arranging for magnet groups to consist of a plurality of pieces of permanent magnets arranged with alternating polarities, housing the magnet groups in first through holes, providing 5 a nonmagnetic cover on the top of the mounting disc having a magnetic bottom board, connecting the bottom board, mounting disc and the cover tightly together by fixed blocks, penetrating the transmission shaft through the blind hole providing radially a transmission arm to the transmission shaft, providing a first slot 10 cooperating with the transmission arm and a second slot cooperating with the wall to the transmission block emboling the transmission shaft; conductor cuts more magnetic lines in the strong magnetic field caused by turning the magnetic turntable in the case of no AC power, therefore, the magnetic turntable can obtain higher efficiency 15 of magnetocaloric effcet. Fig.11 Fig.10

Description

Design method for magnetic turntable Field of the Invention The invention relates to design method for a magnetocaloric device, especially to a design method for a magnetic turntable. Description of prior art 5 When alternating magnetic lines pass through the conductor, the induced electromotive force is generated in the conductor, the loop current generates in the conductor due to the effect of the induced electromotive force. The loop current caused by the passing of the alternating magnetic line through the conductor is called eddy 10 current. the eddy current inside the conductor heat the conductor, the efficiency of the heat is proportional to the square of the frequency of the alternating magnetic field, and the square of the maximum of the magnetic induction intensity. The heating efficiency increases significantly due to the increasing of the 15 frequency of the alternating magnetic field and the magnetic induction intensity. Currently alternating magnetic lines come from alternating current, alternating current causes alternating electric field,alternating electric field causes alternating magnetic field, finally alternating magnetic lines is caused. 20 The patent W01999/000802 discloses a method for manufacturing permanent magnets, according to the patent, permanent magnets with any thickness and any shape can be manufactured, the permanent magnets have high performance without any necessary of cutting. 25 Alternating magnetic lines caused by tranditional way is achieved with the support of electric power. It is the problem to generate an alternating magnetic field with high performance when there is no electric power at the scene. Summary of the present invention 30 The object of the invention is to provide a design method for a 1/9 magnetic turntable so as to solve the above problem. When the turntalbe is rotating, there is an alternating magnetic field generated above the turntable with the advantages of high heat efficiency, low windage, low noise and renewing magnet groups 35 easily. In the following, the technical solution will be discribed. A magnet group 31 assembled by a plurality of permanent magnets 311 arranged with alternating polarities is housed in a first turough hole 351 of the mounting disc 35, the top portion of the mounting 40 disc 35 provids a nonmagnetic cover 32 which arranges axially successive flanges 323, 324 along the inner and outer rims of the cover 32, flanges 323, 324 are arranged to be embeded in the mounting disc 35, lugs321,322 for fixing are respectively and axially arranged to the inner and outer rims of the cover 32, lugs 321,322 45 continuing with the flanges 323,324 penetrate the mounting disc 35. A magnetic bottom board 33 provided at the bottom of the mounting disc 35 inserts into the bottom of the mounting disc 35, sixth through holes 331 cooperated with first convex plates 354 at 50 the bottom of the mounting disc 35 are arranged to the bottom board 33. The bottom board 33, the mounting disc 35 and the cover 32 are connected tightly together by fixed blocks 36,37, one of arc walls of fixed blocks 36,37 coopeartes with lugs 321,322 of the cover 32, 55 connecting walls 363,373 of two arc walls carry both of the bottom plates of the mounting disc 35 and the bottom board 33, the rivet 34 penetrates fixed blocks 36,37 and the lugs 321,322. A blind hole 3512 is arranged to the center of the mounting disc 35, a wall 359 is arranged inside the blind hole 3512, a transmission 60 shaft 4 penetrates the blind hole 3512 and radially has a transmission arm 42, there is also provided a supporting surface 412 cooperating with the mounting disc 35 to the transmission shaft 4. There is provided a first slot 23 cooperating with the transmission arm 42 and a second slot 21 cooperating with the wall 359 to the 2/9 65 transmission block 2 emboling the transmission shaft 4. The transmission shaft 4, the mounting disc 35 and the transmission block 2 are connected tightly together by the nut 1. A torque is exerted to the transmission shaft 4, the transmission arm 42 defined on the transmission shft 4 transfers the force to the 70 transmission block 2 through the first slot 23, the transmission block 2 transfers the force to the wall 359 of the mounting disc 35 through the second slot 21, finally the mounting disc 35 rotates axially with the transmission shaft 4. Accroding to the invention ,there are some advantages of the 75 magnetic turntalbe will be described in the following. The magnetic lines are collected on the plane to be heated due to the effect of the magnetic bottom board, whereby more alternating magnetic lines of a plurality of magnet groups assembed by a plurality of thin permanent magnets are genearted above the 80 magnetic turntable, therefore, the magnetic turntable has a high heat efficiency. The magnetic turntable has low noise due to the cover and the bottom board inserting into the mounting disc. Due to the fastening of U-shaped fixed block, rivets can be easily cut off by diagonal pliers so as to achieve the quick separation of the 85 bottom board, the cover and the mounting disc, when the magnetic energy of the turntable is run out, and then renewing the magnet groups, the assemble can be finished according to the relative process after renewing the magnetic groups. Brief description of the drawing 90 In the following, the invention will be described in greater detail by means of some embodiments with reference to the accompanying drawings, in which Fig.1 is a 3d-drawing of the magnetic turntable of the invention; Fig.2 is a 3d-drawing of the magnetic turntable from another view; 95 Fig.3 is an exploded 3d-drawing fo the turntable; Fig.4 is a front view of the turntable; Fig.5 is a sectional view of Fig.4 along A-A derection; 3/9 Fig.6 is a sectional view of Fig.4 along B-B derection; Fig.7 is a 3d-drawing of the magnetic disc; 100 Fig.8 is a 3d-drawing of the magnetic disc from another view; Fig.9 is an exploded 3d-drawing of the magnetic disc; Fig.10 is a 3d-drawing of the magnet group; Fig.11 is detailed views of the part II in the Fig.14; Fig.12 is a front view of mounting disc assembled with magnet 105 groups; Fig.13 is an exploded 3d-drawing of the magnet group; Fig.14 is a 3d-drawing of the mounting disc; Fig.15 is a 3d-drawing of the mounting disc from another view; Fig.16 is a sectional view of Fig.12 along C-C derection; 110 Fig.17 is detailed views of the part III in the Fig.16; Fig.18 is detailed views of the part I in the Fig.12; Fig.19 is a 3d-drawing of the cover; Fig.20 is a 3d-drawing of bottom board; Fig.21 is an exploded 3d-drawing of the transmission shaft; 115 Fig.22 is a 3d-drawing of the first fixed block; Fig.23 is a 3d-drawing of the second fixed block; Fig.24 is a front view of the transmission block; Fig.25 is a 3d-drawing of the transmission block. 1. the nut; 2. the transmission block; 21. the second slot; 120 22. the eighth through hole; 23. the first slot; 3. the magnetic disc; 31. the magnet group; 311. the permanent magnet; 32. the cover; 321. the first lug; 322. the second lug; 323. the first flange; 324. the second flange; 125 325. the first pre-honing; 33. the bottom board; 331. the sixth through hole; 34. the rivet; 35. the mounting disc; 351. the first through hole; 352. the second through hole; 353. the third through hole; 354. the first convex plate; 355. the fourth through hole; 130 356. the second convex plate; 357. the avoidance hole; 358. the fifth throuth hole; 259. the wall; 4/9 3510. the first ring groove; 3511. the second ring groove; 3512. the blind hole; 3513. the third ring groove; 36. the first fixed block; 361. the first arc wall; 135 362. the second arc wall; 363. the first connecting wall; 364. the second pre-honing; 37. the second fixed block; 371. the third arc wall; 372. the fourth arc wall; 373. the second connecting wall; 374. the third pre-honing; 4. the transmission shaft; 41. the shaft; 140 411. the seventh through hole; 412. the supporting surface; 413.the keyway; 42. the transmission arm; 5. the pin. Detailed description of the preferred embodiment Referring to Fig.1 to Fig.3, there is provided a magnetic turntable. The turntable comprises a magnetic disc 3, a transmission shaft 4, a 145 transmission block 4, a nut 2 and a pin 5. The turntable shown in Fig 7 to Fig.9 comprises a cover 32, a plurality of magnet groups arranged in arrays, a mounting disc 35, a bottom board 33, first blocks 36, second blocks 37 and rivets 34. The magnet groups shown in Fig.10 and Fig.13 consists of 16 picecs 150 of permanent magnets, each permanent magnet is 0.5mm thickness, 3mm height, 5mm length, the adjacent permanent magnets are arranged alternately, the arrangment of polarities shown in Fig.10. The patent W01999/000802 discloses a method of producing laminated permanent magnet, according to the patent, a 155 permanent magnet 311 with a thickness of 0.5mm is achieved. The mounting disc 35 shown in Fig.14 has a disc shape, and is nonmagnetic. The mounting disc 35 provides a first through hole 351 for housing the magnet groups 31, the first through hole 351 is arranged to the mounting disc 35 in the form of a ring array, the 160 central axis of the array is the axis of the mounting disc 35, adjacent magnet groups 31 are arranged such that the radial distance tetween them is 2mm and the tangential distance between them is 1mm (referring to Fig12), the mounting disc 35 further provides coaxially a second ring groove 3511 for receiving the bottom board 5/9 165 33, the second ring groove 3511 is arranged eight first convex plates 354 cooperating with the bottom board 33 (referring to Fig.11), there is provided uniformly four second through holes 352 near the outer ring of the second ring groove 3511, the second through holes 352 alternates with the third through holes 353. The mounting disc 170 35 also arranges coaxially second convex plates 356, which provides coaxially a fifth through hole 358 and a rectangular avoidance hole 357 for avoiding the transimission arm 42 of the transmission shaft 4. The mounting disc 35 shown in Fig.15 provides a third ring groove 175 3513 for housing the first flange 323 of the cover 32 and a first ring groove 3510 for housing the second flange 324 of the cover 32, the first and third ring groove 3510, 3513 are arranged coaxially. The mounting disc 35 provides coaxially a blind hole 3512 for housing the transmission block 2, there is provided uniformly four walls 359 180 coopearting with the transmission block 2 around the blind hole 3512, walls 359 connects with the circumference and the bottom of the blind hole 3512. The cover 32 shown in Fig .19 has a ring thin plate structure, and is nonmagnetic. A successive second flange 324 cooperating with the 185 first ring groove 3510 of the mounting disc 35 is arranged axially to the inner edge of the cover 32, a successive first flange 323 cooperating with the third ring groove 3513 of the mounting disc 35 is arranged axially to the outer edge of the cover 32. Four first lugs 321 cooperating with the second through hole 352 of the mounting 190 disc 35 are arranged axially to the first flange 323, Four second lugs 322 cooperating with the third through hole 352 of the mounting disc 35 are arranged axially to the second flange 324, the first and second lugs 321, 322 are provided with first pre-honings 325 for fastening ivets 34. 195 The bottom board 33 shown in Fig .20 has a ring thin plate structure, and is well magnetic. The bottom board 33 provides eight sixth through holes 331 cooperating with the mounting disc 35. The transmission shaft 4 shown in Fig 21 comprises a shaft 41 and a 6/9 transmission arm 42 arranged assembledly and radially. The shaft 4, 200 from top to bottom, provides a key way 413 for connecting with the outer power source, a supporting surface cooperating with the second convex plate 356 of the mounting disc 35, a seventh through hole 411 cooperating with the transmission arm 42, a tread for fixing the nut 1 and a pinhole for cooperating with cotter pin. 205 The first fixed block 36 shown in Fig.22 has a U-shaped structur. The first fixed block 36 comprises a first arc wall 361, a second arc wall 362 coaxial with the first arc wall 361, a first connecting wall 363 for connecting the first and second arc walls 361, 362, and a second pre-honing 364 penetrating the the first and second arc walls 361, 210 362, the second pre-honing 364 cooperates with the rivet 34. The second fixed block 37 shown in Fig.23 has a U-shaped structure. The first second block 37 comprises a third arc wall 371, a fourth arc wall 372 coaxial with the third arc wall 371, a second connecting wall 373 for connecting the third and fourth arc walls 371, 372, and 215 a third pre-honing 374 penetrating the the third and fourth arc walls 371, 372, the third pre-honing 374 cooperates with the rivet 34. The transmission block 2 shown in Fig.24 and Fig.25 has a thin cylindrical structure, the transmission block 2 comprises coaxially a eighth through hole 22 matching the gap of the shaft 41 of the 220 transmission shaft 4, a first slot 23 cooperating with the transimission arm 42 of the transimission shaft 4, and four second slots 21 located uniformly around the block 2 and cooperating with the wall 359 of the mounting disc 35. The following is the process of assembling the above parts. 225 1. Putting the cover 32 on the desk surface and making the first and second lugs 321, 322 towards up (referrign to Fig.19). 2. Aligning the first and second flanges 323,324 of the cover 32 with the third and first ring grooves 3513, 3510 of the mounting disc 35. 3. Aligning the first and second lugs 321, 322 of the cover 32 with 230 the second and third through holes 352, 353 of the mounting disc 35. 4. Inserting the cover 32 into the mounting disc 35. 7/9 5. Putting the magnet groups 31 in the first through hole 351 of the mounting disc 35, arranging the polarities of adjacent permanent 235 magnets of the neighboring magnet groups are opposite (referring to Fig. 18). 6. Arranging the magnet groups close to the cover 32 and making it not project from the second ring groove 3511 (referring to Fig.16-17). 24o 7. Aligning the eight sixth through holes 331 of the bottom board 33 with the eight first convex plates 354 of the mounting disc 35, inserting the mounting disc 35 into the second ring groove 3511. 8. Fitting the arc wall of four first fixed blocks 36 and four second lugs 322 of the mounting disc 35 in pairs to align the first and 245 second pre-honings 325, 364, and to arranging the first connecting wall 363 support the bottom surfaces of the mounting disc 35 and the bottom board 33, finally connecting the mounting disc 35, the bottom board 33 and the cover 32 tightly together with blind rivets 34. 250 9. Fitting the arc wall of four second fixed blocks 37 and four first lugs 321 of the mounting disc 35 in pairs to align the first and third pre-honings 325, 374, and to arranging the second connecting wall 373 support the bottom surfaces of the mounting disc 35 and the bottom board 33, finally connecting the mounting disc 35, the 255 bottom board 33 and the cover 32 tightly together with blind rivets 34. 10. Inserting the transmission shaft 4 inserted with the transmission arm 42 into the fifth through hole 358 of the mounting disc 35, aligning the supporting surface of the shaft 41 with the second 260 convex plate of the mounting disc 35. 11. Reversing the parts assembled in step 10, sleeving the transmission block 2 into the transmission shaft 4 to arrange the transmission arm 42 in the first slot 21 of the transmission block 2, and to arrange the wall 359 of the mounting disc 35 in the second 265 slot 21 located around the transmission block 2 (referrign to Fig.5-6). 8/9 12. Fastening the transimission shaft 4, the mounting disc 35 and the transmission block 2 together, inserting the pinhole of positioned at the end of the thread of the transmission shaft 4 by 270 the cotter pin 5 to prevent unexpected falling of the nut 1. Although the fastening of the mounting disc 35, the bottom board 33 and the cover 32 can be achieved by the cooperation between screws and nuts, loosening occures inevitably after the turntable rotating, so the dissolution of them occurs during the fast rotating, 275 the magnet groups flying out of the mounting disc 35 causes accident. In order to prevent the loosening of the thread, it is a tranditional way to glue the cooperating portion of he thread such to make the two in one, although this method can prevent the loosening happening, it takes a big trouble to renew the magnet 280 groups 31. 9/9

Claims

1. A design method for a magnetic turntable, comprising positioning adjacent permanent magnets (311) arranged with alternating polarities to a mounting disc (35); characterized by housing a magnet group (31) assembled by a plurality of permanent 5 magnets (311) arranged with alternating polarities in a first turough hole (351) of the mounting disc (35); providing a nonmagnetic cover (32) which arranges axially successive flanges (323, 324) along the inner and outer rims of the cover (32) to the top portion of the mounting disc (35), embedding 10 flanges (323, 324) in the mounting disc (35); arranging respectively and axially lugs(321,322) for fixing to the inner and outer rims of the cover (32), penetrating lugs (321,322) continuing with the flanges (323,324) through the mounting disc (35); 15 inserting a magnetic bottom board (33) provided at the bottom of the mounting disc (35) into the bottom of the mounting disc (35), arranging sixth through holes (331) cooperated with first convex plates (354) at the bottom of the mounting disc (35) to the bottom board (33); 20 connecting the bottom board (33), the mounting disc (35) and the cover (32) tightly together by fixed blocks (36,37), arranging for one of arc walls of fixed blocks (36,37) to cooperate with lugs (321,322) of the cover (32), arranging for connecting walls (363,373) of two arc walls to carry both of the bottom plates of the mounting disc (35) 25 and the bottom board (33), penetrating the rivet (34) into fixed blocks (36,37) and the lugs (321,322); arranging a blind hole (3512) to the center of the mounting disc (35), arranging a wall (359) inside the blind hole (3512),penetrating a transmission shaft (4) through the blind hole (3512) and radially 30 having a transmission arm (42), providing a supporting surface (412) for cooperating with the mounting disc (35) to the transmission shaft (4); 1/2 providing a first slot (23) for cooperating with the transmission arm (42) and a second slot (21) for cooperating with the wall (359) to the 35 transmission block (2) emboling the transmission shaft (4); connecting the transmission shaft (4), the mounting disc (35) and the transmission block (2) tightly together by the nut (1).

2. A design method for a magnetic turntable according to claim 1, 40 characterized by arranging the magnet groups (31) to the mounting disc (35) in the form of a ring array, the central axis of the array being the axis of the mounting disc (35).

3. A design method for a magnetic turntable according to claim 2, 45 characterized by arranging the polarities of adjacent magnets (311) of adjacent magnet groups (31) to opposite.

4. A design method for a magnetic turntable according to claim 3, characterized by arranging for magnet groups (31) to consist of 16 50 picecs of permanent magnets, each permanent magnet being 0.5mm thickness, 3mm heigth, 5mm length.

5. A design method for a magnetic turntable according to claim 4, characterized by arranging adjacent magnet groups (31) such that 55 the radial distance tetween them is 2mm and the tangential distance between them is 1mm.

6. A design method for a magnetic turntable according to claim 1, characterized by locating 4 lugs (321,322) respectively and equally 60 on the inner and outer edges of the cover (32).

7. A design method for a magnetic turntable according to claim 1, characterized by arranging the lugs (321,322) located on the inner and outer edges of the cover (32) alternately along the radial 65 direction. 2/2